Similarly, the number of nonfatal occupational injuries and illnesses reported in 2007 declined to 4 million cases, compared to 4.1 million cases in 2006.

The total recordable case injury and illness incidence rate among private industry employers has declined significantly—by 0.2 cases per 100 workers—each year since 2003, when estimates from the Survey of Occupational Injuries and Illnesses (SOII) were first published using the 2002 North American Industry Classification System (NAICS).